Clinical Edge

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Incidence of Congenital Syphilis

A look at rates and trends in US

Following a decrease in the rate of congenital syphilis (CS) in the US from 2008 to 2012, the rate increased from 2012 to 2014, reflecting an increase in the national rate of primary and secondary syphilis among women, according to an analysis of national surveillance data reported during 2008 to 2014. The study found:

• The national rate of CS decreased in the US from 2008 to 2012 (10.5 cases to 8.4 cases per 100,000 live births).

• The national rate of CS increased 38% from 2012 to 2014 (11.6 cases per 100,000 live births in 2014).

• The increase in the CS rate coincided with a 22% national increase in the rate of primary and secondary syphilis among women during the same period.

• The 2014 CS rate is higher than seen in over a decade.

Citation: Bowen V, Su J, Torrone E, Kidd S, Weinstock H. Increase in incidence of congenital syphilis – United States, 2012-2014. MMWR. 2015;64(44):1241-1245.

Commentary: CS can cause miscarriage, stillbirth, and early infant death. It also is an indicator of the increase in syphilis among adults in the United States over the last three years. To decrease the rate of congenital syphilis, there must be appropriate screening and treatment of both sexually active adults as well as screening pregnant women as a part of prenatal care. The CDC recommends all pregnant women be screened for syphilis at their first prenatal visit. Women at increased risk for syphilis should also be screened at the beginning of their third trimester and again at delivery (1). That said, approximately a fifth of CS cases occurred where the mother never received prenatal care. The CDC recommendations for general syphilis screening are: Screening at least once a year for all sexually active gay, bisexual, and other men who have sex with men (MSM). MSM who have multiple or anonymous partners should be screened more frequently for STDs (ie, at 3- to 6-month intervals). The USPSTF recommends screening for, “persons at increased risk for syphilis infection” and describes increased risk as, “men who have sex with men and engage in high-risk sexual behavior, commercial sex workers, persons who exchange sex for drugs, and those in adult correctional facilities.” (2). There is not currently a general recommendation for syphilis screening for all women. —Neil Skolnik, MD

1. Workowski KA, Bolan GA. Sexually transmitted diseases treatment guidelines, 2015. MMWR Recomm Rep 2015; 64 (No. RR-3).

2. Syphilis Infection: Screening . http://www.uspreventiveservicestaskforce.org/Page/Document/UpdateSummaryFinal/syphilis-infection-screening.